72259987 has 2 divisors, whose sum is σ = 72259988. Its totient is φ = 72259986.

The previous prime is 72259981. The next prime is 72259991. The reversal of 72259987 is 78995227.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72259987 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72259987.

It is not a weakly prime, because it can be changed into another prime (72259981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36129993 + 36129994.

It is an arithmetic number, because the mean of its divisors is an integer number (36129994).

Almost surely, 2^72259987 is an apocalyptic number.

72259987 is a deficient number, since it is larger than the sum of its proper divisors (1).

72259987 is an equidigital number, since it uses as much as digits as its factorization.

72259987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 635040, while the sum is 49.

The square root of 72259987 is about 8500.5874502884. The cubic root of 72259987 is about 416.5168989914.

The spelling of 72259987 in words is "seventy-two million, two hundred fifty-nine thousand, nine hundred eighty-seven".